nations={
    "China":'HuangHe',
    'American':'Mississippi',
    'India':'Nile',
}
for nation,river in nations.items():
    print(f"The {river.title()} runs through {nation.title()}")
for nation in sorted(nations.keys()):
    print(nation.title())
for river in set(nations.values()):
    print(river.title())